Graphene woven fabric as high-resolution sensing element of contact-lens tonometer

In our work, the graphene woven fabrics (GWFs) are investigated as the sensing element of the contact-lens tonometer, which enables precisely monitoring IOP all the daytime. The current-voltage relationship of the device was tested under voltage sweep and the relationships between resistance change and deformation were calculated. Eight devices with GWF in different sizes and CVD conditions were fabricated and the relationship between the current changes of each device and effective IOP increasing, when keeping the voltage constant, was obtained. Combining the highly strain sensing sensitivity and transparency, the contact-lens tonometers with GWF as high-resolution sensing element have a promising prospective.